分页控件 实战 Post篇

< table  id ="pager"  border ="0"  cellpadding ="0"  cellspacing ="0"  width ="100%" >
     < tr >
         < td >
             < asp:LinkButton  ID ="lbtnFirstLink"  runat ="server"  CausesValidation ="false"  OnClick ="ClickEvent" > 首页 </ asp:LinkButton >
             < asp:LinkButton  ID ="lbtnPrevPage"  runat ="server"  CausesValidation ="false"   OnClick ="ClickEvent" > 上一页 </ asp:LinkButton >
    
             < asp:Repeater  ID ="rptNum"  runat ="server"  OnItemCommand ="rptNum_ItemCommand" >
                 < ItemTemplate >
     < asp:LinkButton  ID ="lbtnNum"  runat ="server"  CausesValidation ="false"  CommandArgument ='<%#  Container.DataItem % > '
    CssClass=' <% # Convert.ToInt32(Container.DataItem) == PageIndex? " num_yellow " : " num_blue " %> ' Width="15"> <% # Container.DataItem  %>

</ asp:LinkButton >
                 </ ItemTemplate >
             </ asp:Repeater >
      
             < asp:LinkButton  ID ="lbtnNextPage"  runat ="server"  CausesValidation ="false"   OnClick ="ClickEvent" > 下一页 </ asp:LinkButton >
             < asp:LinkButton  ID ="lbtnLastPage"  runat ="server"  CausesValidation ="false"   OnClick ="ClickEvent" > 尾页 </ asp:LinkButton >
             < asp:HiddenField  ID ="hfBindName"  runat ="server"   />
         </ td >
     </ tr >
</ table >

     private   int  _PageIndex;
     public   int  PageIndex
    {
         get { if  (_PageIndex  ==   0 ){ _PageIndex  =   1 ;} return  _PageIndex;}
         set { _PageIndex  =  value;}
    }    
     private   int  _PageSize;
     public   int  PageSize
    {
         get { if  (_PageSize  ==   0 ){_PageSize  =   1 ;} return  _PageSize;}
         set { _PageSize  =  value;}
    }
     private   int  _Count;
     public   int  Count
    {
         get { return  _Count; }
         set  { _Count  =  value; }
    }
     ///   <summary>
     ///  该方法名称修饰符为需为public
     ///   </summary>
     public   string  BindName
    {
         get { return  hfBindName.Value;}
         set {hfBindName.Value  =  value; }
    }

public   void  BindPager()
{
         int  pageCount  =  (Count  %  PageSize)  ==   0   ?  Count  /  PageSize : Count  /  PageSize  +   1 ; // 页数
        SetButtonEnable(pageCount); // 下面四个按钮可用状态设置
        BindPageNum(pageCount); // 绑定循环数字
}

private   void  SetButtonEnable( int  pageCount)
{
        lbtnFirstLink.Enabled  =  PageIndex  !=   1 ;
        lbtnPrevPage.Enabled  =  PageIndex  !=   1 ;
        lbtnNextPage.Enabled  =  PageIndex  !=  pageCount;
        lbtnLastPage.Enabled  =  PageIndex  !=  pageCount;
        lbtnFirstLink.CommandArgument  =   " 1 " ;
        lbtnPrevPage.CommandArgument  =  (PageIndex  -   1 ).ToString();
        lbtnNextPage.CommandArgument  =  (PageIndex  +   1 ).ToString();
        lbtnLastPage.CommandArgument  =  pageCount.ToString();
}

protected   void  BindPageNum( int  pageCount)
{
         int  start  =   1 , end  =   10 ;
         if  (pageCount  <  end) // 页数小于10
        {
            end  =  pageCount;
        }
         else
        {
            start  =  (PageIndex  >   5 )  ?  PageIndex  -   5  : start;
             int  result  =  (start  +   9 )  -  pageCount; // 是否超过最后面的页数
             if  (result  >   0 )
            {
                end  =  pageCount;
                start  -=  result; // 超过后,补差
            }
             else
            {
                end  =  start  +   9 ;
            }
        }
        ReBindNum(start, end);
}

private   void  ReBindNum( int  start,  int  end)
{
         int [] rows  =   new   int [end-start+1 ];//这里之前写10，修正为end-start+1。
         int  index  =   0 ;
         for  ( int  i  =  start; i  <=  end; i ++ )
        {
            rows[index]  =  i;
            index ++ ;
        }
        rptNum.DataSource  =  rows;
        rptNum.DataBind();
 }

private void ReBindData(string pageIndex)
{
        PageIndex = int.Parse(pageIndex);
        object obj = base.Parent is HtmlForm ? this.Page : base.Parent;
        MethodInfo mi = obj.GetType().GetMethod(BindName);
        mi.Invoke(obj,null);
        BindPager();
}

<% @ Page Language = " C# "  AutoEventWireup = " true "  CodeFile = " PagerDemo.aspx.cs "  Inherits = " PagerDemo "  EnableTheming = " false "   %>
<% @ Register Src = " UserControls/Pager.ascx "  TagName = " Pager "  TagPrefix = " uc1 "   %>
<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
< html  xmlns ="http://www.w3.org/1999/xhtml"   >
< head  runat ="server" >
     < title > 路过秋天 分页控件演示 </ title >
     < style  type ="text/css" >
    #pager  { color : White ; }
    #pager a { color : White ; text-decoration : none ;   }
    .num_blue { color : White ; border : solid 1px Blue ; text-align : center ; }
    .num_yellow { color : while ; border : solid 1px Yellow ;  text-align : center ; }
     </ style >
</ head >
< body  style ="background-color:Black;color:White;" >
     < form  id ="form1"  runat ="server" >
     < div >< asp:GridView  ID ="gvUsers"  runat ="server" ></ asp:GridView >< br  />
         < uc1:Pager  ID ="Pager1"  runat ="server"   />
     </ div >
     </ form >
</ body >
</ html >

protected   void  Page_Load( object  sender, EventArgs e)
{
         if  ( ! IsPostBack)
        {
            LoadData();
        }
}
public   void  LoadData()
{
         int  count;
        MAction action  =   new  MAction(TableNames.Users);
        MDataTable mTable  =  action.Select(Pager1.PageIndex, Pager1.PageSize,  "" ,  out  count);
        action.Close();
        gvUsers.DataSource  =  mTable;
        gvUsers.DataBind();
        Pager1.BindName  =   " LoadData " ;
        Pager1.Count  =  count;
}